WO2010147957A2 - Composés dithiols, dérivés et utilisations de ceux-ci - Google Patents

Composés dithiols, dérivés et utilisations de ceux-ci Download PDF

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WO2010147957A2
WO2010147957A2 PCT/US2010/038632 US2010038632W WO2010147957A2 WO 2010147957 A2 WO2010147957 A2 WO 2010147957A2 US 2010038632 W US2010038632 W US 2010038632W WO 2010147957 A2 WO2010147957 A2 WO 2010147957A2
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substituted
unsubstituted
alkyl
formula
compound
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PCT/US2010/038632
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WO2010147957A3 (fr
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William Garner
Margaret Garner
Ronald D. Blum
George Minno
David Gooden
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Encore Health, Llc
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Priority to EP21167955.0A priority Critical patent/EP4082542A1/fr
Priority to DK10790038.3T priority patent/DK2442647T3/en
Priority to EP10790038.3A priority patent/EP2442647B1/fr
Priority to EP19152441.2A priority patent/EP3542629A3/fr
Publication of WO2010147957A2 publication Critical patent/WO2010147957A2/fr
Publication of WO2010147957A3 publication Critical patent/WO2010147957A3/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/38—Heterocyclic compounds having sulfur as a ring hetero atom
    • A61K31/381—Heterocyclic compounds having sulfur as a ring hetero atom having five-membered rings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/095—Sulfur, selenium, or tellurium compounds, e.g. thiols
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/38—Heterocyclic compounds having sulfur as a ring hetero atom
    • A61K31/382—Heterocyclic compounds having sulfur as a ring hetero atom having six-membered rings, e.g. thioxanthenes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/38—Heterocyclic compounds having sulfur as a ring hetero atom
    • A61K31/385—Heterocyclic compounds having sulfur as a ring hetero atom having two or more sulfur atoms in the same ring
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
    • A61K31/4025—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil not condensed and containing further heterocyclic rings, e.g. cromakalim
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
    • A61K31/4164—1,3-Diazoles
    • A61K31/4178—1,3-Diazoles not condensed 1,3-diazoles and containing further heterocyclic rings, e.g. pilocarpine, nitrofurantoin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
    • A61K31/4965—Non-condensed pyrazines
    • A61K31/497—Non-condensed pyrazines containing further heterocyclic rings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/535—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines
    • A61K31/5375—1,4-Oxazines, e.g. morpholine
    • A61K31/5377—1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/66—Phosphorus compounds
    • A61K31/67—Phosphorus compounds having sulfur as a ring hetero atom
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/70—Carbohydrates; Sugars; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/74—Synthetic polymeric materials
    • A61K31/765—Polymers containing oxygen
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
    • A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/0012—Galenical forms characterised by the site of application
    • A61K9/0048—Eye, e.g. artificial tears
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P27/00—Drugs for disorders of the senses
    • A61P27/02—Ophthalmic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P27/00—Drugs for disorders of the senses
    • A61P27/02—Ophthalmic agents
    • A61P27/12—Ophthalmic agents for cataracts
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D339/00—Heterocyclic compounds containing rings having two sulfur atoms as the only ring hetero atoms
    • C07D339/02—Five-membered rings
    • C07D339/04—Five-membered rings having the hetero atoms in positions 1 and 2, e.g. lipoic acid
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
    • C07D409/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings
    • C07D409/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/06—Radiation therapy using light
    • A61N5/0613—Apparatus adapted for a specific treatment
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    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/06—Radiation therapy using light
    • A61N5/067—Radiation therapy using light using laser light

Definitions

  • U.S. Patent Application 11/946,659 is a continuation-in-part of U.S. Patent Application 11/135,271, filed May 24, 2005 (which claims priority to U.S. Provisional Patent Application 60/574,211, filed May 26, 2004), U.S. Patent Application 11/010,436, filed December 14, 2004, and U.S. Patent Application 10/969,868, filed October 22, 2004, each of which is a continuation or continuation-in-part of U.S. Patent Application 10/050,879, filed January 18, 2002, now U.S. Patent 6,923,955, which claims priority to U.S.
  • Both presbyopia and cataract are age-related and may share common etiologies such as lens growth, oxidative stress, and/or disulfide bond formation.
  • a compound having the structure of Formula I or pharmaceutically acceptable salt thereof:
  • each of X and Y can be sulfur, selenium, or a sulfonic group.
  • X and Y are both sulfur.
  • one of X and Y is sulfur, and the other is sulfur or selenium.
  • R 1 Q is substituted or unsubstituted alkylene.
  • R 21 R30, and R31 is independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted heteroalkyl, substituted or unsubstituted heterocycloalkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl.
  • Z is N or O.
  • Variable m is 0 or 1, wherein if Z is N, then m is 1, and if Z is O, then m is 0.
  • R30 and R 31 together form a single bond (thereby creating a structure of Formula I) or are they are substituents joined together to form a heteroocyclic ring including X and Y.
  • a compound of Formula I is employed for pharmaceutical formulations (including a pharmaceutically acceptable excipient) and/or methods of treating ocular disease, e.g., presbyopia or cataract.
  • Fig. 2 shows a trend graph of the shear modulus versus position in the lens and age. Weeber, HA et al. 2007. Stiffness gradient in the crystalline lens. Graefes Arch Clin Exp Ophthalmol 245(9): 1357-66. The line at the bottom is the 20-year-old lens; the line at the top is the 70-year-old lens. The modulus increases with age for all positions in the lens. Measurements were taken up to 4.0 mm from the lens centre. The lines are extrapolated to a radius of 4.5 mm (lens diameter 9.0 mm).
  • Fig. 3 depicts the average opacity (opacimetry) of an untreated human lens as a function of age in years. Bonomi, L et al. 1990. Evaluation of the 701 interzeag lens opacity meter. Graefe's Arch Clin Exp Ophthalmol 228(5):447-9. Lens opacity was measured in 73 healthy subjects between 10 and 76 years of age without slit-lamp evidence of cataract and with a visual acuity of 20/20. These subjects were classified into ten age groups. This study was carried out using the Interzeag Opacity Meter according to the procedure described by Flammer and Bebies (Flammer J, Bebie H. 1987. Lens Opacity Meter: a new instrument to quantify lens opacity. Ophthalmologica 195 (2): 69-72) and following the suggestions of the operating manual for the instrument.
  • Fig. 4 depicts a scatter plot of the change in ⁇ D (micrometers) in the absence (control) and presence of lipoic acid in lens organ culture experiments.
  • the symbol % designates significantly larger changes in ⁇ D when compared to controls.
  • Statistical values are highly significant at p ⁇ 0.0001 by unpaired t-test and by Kruskal Wallis test, which compared medians of each data set.
  • Fig. 5 depicts a scattergram of the percent of the total protein SH groups in disulfide bonds.
  • Free SH groups were alkylated with 4-acetamido-4'-maleimidylstilbene-2,2'-sulfonic acid (c, 1 ⁇ M, 5 ⁇ M, 9.6 ⁇ M, 50 ⁇ M, 96 ⁇ M) or 7-diethylamino-3-(4'maleimidylphenyl)-4- methyl coumarin (500 ⁇ M, and 500 ⁇ M c).
  • the S-S bonds were reduced and alkylated with fluorescein-5-maleimide.
  • Absorption spectra were used to calculated total protein (A280 nm), free protein SH (A322 or A384), and protein SS (A490) using the appropriate extinction coefficients.
  • the symbol % indicates statistically significant difference of mean with mean of control (c, p ⁇ 0.05).
  • substituent groups are specified by their conventional chemical formulae, written from left to right, they equally encompass the chemically identical substituents that would result from writing the structure from right to left, e.g., -CH 2 O- is equivalent to -OCH 2 -. In other words, no orientation is implied by the direction that the group is written.
  • alkyl by itself or as part of another substituent, means, unless otherwise stated, a straight (i.e., unbranched) or branched chain, or combination thereof, which may be fully saturated, mono- or polyunsaturated (i.e., alkenyl) and can include di- and multivalent radicals (e.g., alkylene), having the number of carbon atoms designated (i.e., C 1 -C 1O means one to ten carbons).
  • saturated hydrocarbon radicals include, but are not limited to, groups such as methyl, ethyl, n-propyl, isopropyl, n-butyl, t-butyl, isobutyl, sec-butyl, (cyclohexyl)methyl, homologs and isomers of, for example, n-pentyl, n-hexyl, n-heptyl, n- octyl, and the like.
  • An unsaturated alkyl group is one having one or more double bonds or triple bonds.
  • alkenyl groups examples include, but are not limited to, vinyl, 2-propenyl, 2-isopentenyl, 2-(butadienyl), 2,4-pentadienyl, 3-(l,4- pentadienyl), ethynyl, 1- and 3-propynyl, 3-butynyl, and the higher homologs and isomers.
  • An alkoxy is an alkyl attached to the remainder of the molecule via an oxygen linker (-O-).
  • An alkthio is an alkyl attached to the remainder of the molecule via a sulfur linker (-S-).
  • heteroalkyl by itself or in combination with another term, means, unless otherwise stated, a stable straight or branched chain, or combinations thereof, consisting of at least one carbon atom and at least one heteroatom.
  • a “heteroatom” includes oxygen (O), nitrogen (N), sulfur (S), phosphorus (P), selenium (Se) and silicon (Si), wherein N and S may optionally be oxidized, and N may optionally be quaternized.
  • a heteroatom(s) may be placed at any chemically acceptable position including an interior position, the position at which the alkyl group is attached to the remainder of the molecule (the proximal end), or at the distal end (e.g., for heteroalkylene groups).
  • Examples include, but are not limited to: -C(O)R', -C(O)NR', -NR'R", -OR, -SR, and/or -SO 2 R, and -CN. Up to two heteroatoms may be consecutive, such as, for example, -CH2-NH-OCH3.
  • cycloalkyl and heterocycloalkyl mean, unless otherwise stated, cyclic versions of “alkyl” and “heteroalkyl,” respectively.
  • cycloalkyl include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, and cycloheptyl,.
  • heterocycloalkyl include, but are not limited to, piperidinyl, piperazinyl, morpholinyl, tetrahydrofuranyl, and tetrahydrothienyl.
  • aryl by itself or in combination with another term, means, unless otherwise stated, a polyunsaturated, aromatic, hydrocarbon group, which can be a single ring or multiple rings (preferably from 1 to 3 rings) that are fused together or linked covalently.
  • a fused ring aryl refers to multiple rings fused together wherein at least one of the fused rings is an aryl ring.
  • heteroaryl by itself or in combination with another term, means, unless otherwise stated an aryl group (as defined above) containing one to four heteroatoms (as defined above).
  • heteroaryl includes fused ring heteroaryl groups, which are multiple rings (e.g., 5 and/or 6-membered rings) fused together wherein at least one of the fused rings is a heteroaromatic ring.
  • a heteroaryl group can be attached to the remainder of the molecule through a carbon or heteroatom.
  • Non- limiting examples of aryl and heteroaryl groups include phenyl, naphthyl, pyrrolyl, pyrazolyl, imidazolyl, pyrazinyl, oxazolyl, thiazolyl, furyl, thienyl, pyridyl, pyrimidyl, purinyl, benzothiazolyl, benzimidazolyl, indolyl, isoquinolyl, quinoxalinyl, 5-quinoxalinyl, and quinolyl.
  • aryl when used in combination with other terms (e.g., aryloxy, arylthioxy, arylalkyl) includes both aryl and heteroaryl rings as defined above.
  • arylalkyl is meant to include those radicals in which an aryl group is attached to an alkyl group (e.g., benzyl, phenethyl, pyridylmethyl, and the like) including those alkyl groups in which a carbon atom (e.g., a methylene group) has been replaced by, for example, an oxygen atom (e.g., phenoxymethyl, 2-pyridyloxymethyl, 3-(l-naphthyloxy)propyl, and the like).
  • the non-cyclical groups typically have 1 to 24 atoms, preferably 1 to 10 atoms, more preferably 1 to 8 atoms (referred to as "lower" substituent group).
  • the cyclical groups typically have from 3 to 8 members, preferably 4 to 8 members, more preferably 5 to 7 members.
  • any of the above groups — alkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, aryl, and heteroaryl — may be unsubstituted or substituted. Exemplary substituents are described below. Further, the substituents themselves may also be unsubstituted or substituted.
  • a "substituent group,” as used herein, means a group selected from the following moieties:
  • halo or halogen by themselves or as part of another substituent, mean, unless otherwise stated, a fluorine, chlorine, bromine, or iodine atom. Additionally, terms such as “haloalkyl” are meant to include monohaloalkyl and polyhaloalkyl.
  • halo(C 1 -C 4 )alkyl includes, but is not limited to, fluoromethyl, difluoromethyl, trifluoromethyl, 2,2,2-trifluoroethyl, 4-chlorobutyl, 3-bromopropyl, and the like.
  • acyl means -C(O)R where R is a substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted heteroalkyl, substituted or unsubstituted heterocycloalkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl.
  • oxo means an oxygen that is double bonded to a carbon atom.
  • alkylsulfonyl means a moiety having the formula -S( ⁇ 2 )-R', where R' is an alkyl group as defined above. R' may have a specified number of carbons (e.g., "C 1 -C 4 alkylsulfonyl").
  • R, R", R", and R" can be independently hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted heteroalkyl, substituted or unsubstituted heterocycloalkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl.
  • alkyl is meant to include groups including carbon atoms bound to groups other than hydrogen groups, such as haloalkyl (e.g., -CF 3 and -CH 2 CF 3 ) and acyl (e.g., -C(0)CH 3 , -C(O)CF 3 , -C(O)CH 2 OCH 3 ).
  • haloalkyl e.g., -CF 3 and -CH 2 CF 3
  • acyl e.g., -C(0)CH 3 , -C(O)CF 3 , -C(O)CH 2 OCH 3 .
  • Substituents for the non-aromatic groups may be present in any number from zero to (2m'+l), where m' is the total number of carbon atoms in the group.
  • Substituents for the aromatic groups (aryl and heteroaryl) may be present in any number from zero to the total number of open valences on the aromatic ring system.
  • Two or more substituents may optionally be joined to form aryl, heteroaryl, cycloalkyl, or heterocycloalkyl groups.
  • Such so-called ring-forming substituents are typically, though not necessarily, found attached to a cyclic base structure.
  • the ring-forming substituents are attached to adjacent members of the base structure.
  • two ring-forming substituents attached to adjacent members of a cyclic base structure create a fused ring structure.
  • the ring-forming substituents are attached to a single member of the base structure.
  • two ring- forming substituents attached to a single member of a cyclic base structure create a spirocyclic structure.
  • the ring-forming substituents are attached to non-adjacent members of the base structure.
  • Certain compounds of the present invention possess asymmetric carbon atoms (optical centers) or double bonds; the racemates, diastereomers, tautomers, geometric isomers, and individual isomers are encompassed within the scope of the present invention.
  • the compounds of the present invention do not include those that are known in the art to be too unstable to synthesize and/or isolate.
  • the compounds of the present invention may also contain unnatural proportions of atomic isotopes at one or more of the atoms that constitute such compounds.
  • the compounds may be radio-labeled with radioactive isotopes, such as for example tritium ( 3 H), iodine-125 ( 125 I), or carbon-14 ( 14 C). All isotopic variations of the compounds of the present invention, whether radioactive or not, are encompassed within the scope of the present invention.
  • any numerical values recited herein include all values from the lower value to the upper value in increments of any measurable degree of precision.
  • a variable such as age, amount, time, percent increase/decrease and the like is 1 to 90, specifically from 20 to 80, and more specifically from 30 to 70, it is intended that values such as 15 to 85, 22 to 68, 43 to 51, 30.3 to 32, etc., are expressly enumerated in this specification.
  • all possible combinations of numerical values between the lowest value and the highest value enumerated are to be considered to be expressly stated in this application in a similar manner.
  • agents, compositions, and methods that can prevent, reduce, reverse, and/or slow the rate of lens growth, oxidative damage, and/or disulfide bond formation.
  • these agents, compositions, and methods can effectively prevent or treat presbyopia and/or cataract.
  • the agents, compositions, and methods can effectively prevent or treat presbyopia.
  • the agents described herein are dithiol compounds or dithiol derivatives.
  • Dithiol compounds contain at least two sulfur atoms, preferably exactly two sulfur atoms, while dithiol derivatives include a selenium or sulfonic group in place of one or more sulfur atoms of a dithiol compound.
  • the agent has at least two components, each independently selected from a sulfur atom, a selenium atom, and a sulfonic group.
  • the agent has at least two components, each independently selected from a sulfur atom and a selenium atom.
  • the agents contemplated herein can be cyclical, e.g., a five- or six-membered heterocycle, or non-cyclical.
  • Exemplary f ⁇ ve-membered heterocycles (designated by the term "Formula 5" in the compound name) include, but are not limited to:
  • Exemplary six-membered heterocycles include, but are not limited to:
  • exemplary non-cyclical agents include, but are not limited to:
  • the agents can be classified in various ways.
  • the agent can be encompassed by any one of the following classification groups:
  • 6A, 6B, 6C, 6D, and 6E "6-membered cyclical"
  • substituents X and Y of any of Formulae 5A-B, 6A-E or NC are independently selected from a sulfur atom, a selenium atom, and a sulfonic group.
  • at least one of X and Y is sulfur.
  • X and Y are both sulfur.
  • one of X and Y is sulfur, and the other is sulfur or selenium.
  • one of X and Y is sulfur, and the other is selenium.
  • the compound of any of Formulae 5A-B, 6A-E or NC is a seleno derivative where at least one of X and Y is selenium. Without being bound by theory, it is believed that the selenium atom advantageously helps to overcome redox potential.
  • each R group of Formulae 5A-B, 6A-E or NC is independently -H, -OH, -OAc, -OR, -SR, -CO 2 R, an electron withdrawing group, a linear or branched C 1-1S alkyl optionally substituted by one or more ether, ester, carboxylic acid, phosphate, amide, and/or amine groups, wherein R is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted heteroalkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted heterocycloalkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl.
  • each R group is independently -H, -OH, -OAc, -CO 2 CH 3 , or a linear C 1-1S alkyl optionally having a distal terminal that is -COOH, -NH 2 , -CO 2 CH 3 , or -CO 2 CH 2 CH 3 .
  • R group in the context of compounds of any of the formulae described herein refers to any Of R 1 , R 2 , R3, R4, R5, R 6 , R7, Rs, R9, Rio, Rn, R12, R13, R14, R15, Ri6, Rn or R 1 S, R19, R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, R32, R33, and/or R 34 .
  • agents can be prepared by altering the placement of a particular R group.
  • any particular R group can be attached to a carbon adjacent to a thiol group (sulfur atom) or thiol derivative (e.g., selenium or sulfonic group).
  • R 1 , R 2 , R 7 , Re, R9, Rio, Rn, R12, Ri3, and R 14 represent such thiol-adjacent positions.
  • an R group can be attached to a carbon not adjacent to a thiol group or thiol derivative.
  • R 3 , R 4 , R 5 , and R 6 represent such non-adjacent positions.
  • an R group can be attached directly to a thiol group or thiol derivative.
  • R 15 , R 16 , R 17 , and R 1 S represent such direct thiol or thiol derivative attachments.
  • one, two, or more R groups are -H.
  • both OfR 15 and R 16 are -H.
  • one, two, or more R groups are -OH.
  • one, two, or more R groups are -OAc.
  • -OAc an acetate ester
  • each R group is independently -H, -OH, -OAc, or - CH 3 .
  • one R group is a chain substituent (e.g., substituted or unsubstituted alkyl, preferably a C 1-18 alkyl), and the remaining R groups are independently H, -OH, -OAc, or -CH 3 .
  • the agent has the structure of Formula 6A:
  • one, two, or more R groups are -CO 2 R, wherein R is as defined herein for any of Formulae 5A-B, 6A-E or NC.
  • one, two, or more R groups are -OR.
  • the R of -CO 2 R or -OR' is a lower alkyl group having 1-8 carbons.
  • the agent can be modified by altering the length of the chain substituent(s).
  • longer chains are believed to render the compound more hydrophobic, more lipid soluble, and thus more easily transported across the cell membrane.
  • the length of the chain is limited by the lipid membrane width; a chain longer than the membrane width is likely to cause saponification.
  • Shorter chains, on the other hand, and other similarly small substituents such as -OH and -CO 2 CH 3 may be useful for preparing agents that are biologically active in the cytosol and do not require membrane permeability.
  • Substituent size and its concomitant effect on solubility also affect formulation considerations. For example, a hydrophobic drug may be more difficult to formulate as an administratable solution, but it may be more easily formulated for sustained release delivery systems.
  • the agent includes a linear substituted or unsubstituted C 1-1S alkyl or heteroalkyl, which are collectively referred to herein as "linear substituents.”
  • linear substituents refers to substituted or unsubstituted branched C 1-1 S alkyl or heteroalkyl.
  • linear substituents are more commonly found in natural compounds, so agents including linear substituents may be better tolerated by the body.
  • branched substituents may also be used.
  • the linear substituent can be, for example, attached to a carbon adjacent to a thiol group (sulfur atom) or thiol derivative (e.g., selenium or sulfonic group).
  • one or more OfR 1 , R 2 , R 7 , Rs, R9, Rio, R 11 , R 12 , Ri 3 , and R 14 is a linear substituent. In other embodiments, one or more OfR 3 , R 4 , R 5 , and R 6 is a linear substituent.
  • a chain substituent e.g., substituted or unsubstituted alkyl, preferably a C 1-1S alkyl
  • a chain substituent includes an ether, ester, carboxylic acid, phosphate, amide, and/or amine group at the distal terminal of a chain.
  • the distal terminal is a carboxylic acid or an amine.
  • one, two, or more R groups are -(CH 2 ) 2 _ioC0 2 H or -(CH 2 ) 2 _ioNH 2.
  • carboxylic acid and amine terminals provide attachment points for natural amino acids to form peptide amide bonds.
  • the carboxylic acid terminal of exemplary agent lipoic acid is often covalently attached to the amine lysine side chain of the active mitochondrial enzyme. The mitochondrial functionality of lipoic acid is discussed in further detail below.
  • the distal terminal of a chain substituent is an ester, e.g., methyl, ethyl, or isopropyl ester.
  • one, two, or more R groups are -(CH 2 ) 2 _ 10 CO 2 CH 3 or -(CH 2 ) 2 _ 10 CO 2 CH 2 CH 3 .
  • esterification is believed to be one way to modify the delivery of the pharmaceutical agent since the agent is inhibited from entering the cell until the ester is broken, e.g., by naturally occurring esterases. In this way, an esterif ⁇ ed agent can serve as a prodrug that can be converted to an active form, as known in the art.
  • the linear substituent is a substituted or unsubstituted linear C 1 . is, C 2-12 , C 2-1 O, C 2 _8, C 2 _6, C 4 _6, C5_6, or C5 alkyl.
  • Exemplary agents including a linear alkyl substituent are provided in Table 1 following, wherein the remaining R groups which are not expressly defined in Table 1 are independently -H, -OH, -OAc, or -CH 3 .
  • agent lipoic acid and some derivatives thereof include a divalent linear alkylene functionality with a carboxylic acid terminal:
  • the agent is lipoic acid (5-(l,2-dithiolan-3-yl)pentanoic acid), particularly alpha lipoic acid.
  • the agent is a lipoic acid derivative.
  • Preferred lipoic acid derivatives do not interfere with the natural cellular mechanisms utilizing lipoic acid and/or dihydrolipoic acid.
  • the agents described herein include those having relatively minor modifications to lipoic acid (e.g., altering chain length, replacing a sulfur atom with selenium) such that naturally occurring mitochondrial mechanisms can utilize either lipoic acid or the derivative. Agents having minor modifications may be relatively substitutable for lipoic acid and do not interfere with mitochondrial activity.
  • the agent functionally mimics lipoic acid in terms of redox activity and/or mitochondrial activity, but is not structurally identical to lipoic acid.
  • Other agents include those having more major modifications to lipoic acid (e.g., altering chain placement). Such major modifications may render the agent unrecognizable to the mitochondria, thus avoiding interference with cellular mechanisms. In this way, both minor and major modifications can avoid mitochondrial interference. Mitochondrial interference, or the lack thereof, can be verified by in vitro testing according to methods known in the art such as, for example, a JC-I Mitochondrial Membrane Potential Assay Kit (Cell Tech. Inc.).
  • Exemplary lipoic acid derivatives include, but are not limited to: 5- (l,2-thiaselenolan-5-yl)pentanoic acid and 5-(l,2-thiaselenolan-3-yl)pentanoic acid.
  • lipoic acid or derivatives thereof may upregulate antioxidant pathways (e.g., thioredoxin). Key to this upregulation is the Nrf2 response element. See Li, X., Liu, Z., et al. 2008. Lipoamide protects retinal pigment epithelial cells from oxidative stress and mitochondrial dysfunction. Free Radic Biol Med. 44(7): 1465-1474. This suggests that the mechanism of action for lipoic acid and derivatives includes not only its antioxidant properties, but also an upregulation of other enzymes.
  • antioxidant pathways e.g., thioredoxin
  • the linear substituent is a linear C 1-18 , C 1 -S, Cs -1 S, C 10-18 , or C 10-16 , or C 12-14 alkenyl, the alkenyl chain of which can have one, two, three, or more double bonds.
  • linear alkenyls of relatively longer length e.g., C 10- 18 , particularly those including a carboxylic acid or ester group, may exhibit advantageous properties similar to a fatty acid group.
  • each of R 17 and R 1 S is independently selected from C 2 -S, C 2-6 , C 3-6 , C 3-5 , or C 3 alkenyl.
  • R 17 and/or R 1 S is an -SC 2 -S alkenyl.
  • a chain substituent can include more than one substituent.
  • one exemplary agent is cystine (3,3'-disulanedylbis(2-aminopropanoic acid)), which includes both carboxylic acid and amine substituents.
  • the agent is cystine or a derivative thereof such as the exemplary derivative shown below: cystine
  • an R group substituent is an electron withdrawing group, which can decrease the pKa of the agent.
  • Electron withdrawing groups include, but are not limited to halogens (e.g., F, Cl), nitriles (CN), carboxylic acids (COOH), and carbonyls (CO).
  • the agent is an allium oil antioxidant or a derivative thereof.
  • Allium oil antioxidants are advantageously natural, nontoxic, and lipid soluble. Some have been studied as potential cytostatic agents for the treatment of atherlerosclerosis, cancer, etc. Without being bound be theory, the cytostatic properties may also provide advantageous efficacy in the context of ocular diseases caused by lens growth, including presbyopia and cataract.
  • dithiines include, but are not limited to:
  • Allium oil antioxidants include, but are not limited to: Diallyl disulfide (allitin)
  • the agent can be a dithiane or a derivative thereof.
  • dithianes increase cellular non-protein SH, a primary objective in the treatment of presbyopia.
  • exemplary dithianes include, but are not limited to:
  • the agent is a derivative of dithiothreitol (DTT) such as trans- 4,5-dihydroxy-l,2-dithiane, also referred to herein as "non-lethal DTT”:
  • DTT dithiothreitol
  • the compound is a heterocyclic ester or amide having the structure of Formula I:
  • Formula I Formula I-NC wherein X and Y are as defined above, and Z is nitrogen (N) or oxygen (O), and m is 0 or 1, wherein if Z is N, then m is 1, and if Z is O, then m is 0.
  • Rw is R22-substituted or unsubstituted alkylene, or R22-substituted or unsubstituted heteroalkylene, wherein R22 is independently substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted heteroalkyl, substituted or unsubstituted heterocycloalkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl.
  • R 19 is a substituted or unsubstituted alkylene, e.g., a C 1-S , C 1-6 , C 3 _ 5 , or C 4 alkylene.
  • R20 is hydrogen,R23-substituted or unsubstituted alkyl, R23-substituted or unsubstituted cycloalkyl, R23-substituted or unsubstituted heteroalkyl, R23-substituted or unsubstituted heterocycloalkyl, R 23 -substituted or unsubstituted aryl, or R 23 -substituted or unsubstituted heteroaryl.
  • R25 is independently unsubstituted alkyl, unsubstituted cycloalkyl, unsubstituted heteroalkyl, unsubstituted heterocycloalkyl, unsubstituted aryl or unsubstituted heteroaryl.
  • R20 is hydrogen or an unsubstituted lower alkyl, e.g., methyl, ethyl, propyl, or butyl.
  • R 2 o is hydrogen.
  • R 21 is R 26 -substituted or unsubstituted alkyl, R 26 -substituted or unsubstituted cycloalkyl, R 2 6-substituted or unsubstituted heteroalkyl, R 2 6-substituted or unsubstituted heterocycloalkyl, R 2 6-substituted or unsubstituted aryl, or R 2 6-substituted or unsubstituted heteroaryl.
  • R 2 8 is independently unsubstituted alkyl, unsubstituted cycloalkyl, unsubstituted heteroalkyl, unsubstituted heterocycloalkyl, unsubstituted aryl or unsubstituted heteroaryl.
  • R 3 o and R 31 are each independently selected from hydrogen,R 32 -substituted or unsubstituted alkyl, R 32 -substituted or unsubstituted cycloalkyl, R 32 -substituted or unsubstituted heteroalkyl, R 32 -substituted or unsubstituted heterocycloalkyl, R 32 -substituted or unsubstituted aryl, or R32-substituted or unsubstituted heteroaryl.
  • R 34 is independently unsubstituted alkyl, unsubstituted cycloalkyl, unsubstituted heteroalkyl, unsubstituted heterocycloalkyl, unsubstituted aryl or unsubstituted heteroaryl.
  • R 3 o and R 31 are each independently hydrogen or an unsubstituted lower alkyl. In another embodiment, R 3 o and R 31 are each hydrogen.
  • R 3 o and R 31 together form a single bond (thereby creating a structure of Formula I) or are they are substituents (e.g., substituted or unsubstituted alkyl or substituted or unsubstituted heteroalkyl) joined together to form a heteroocyclic ring including X and Y.
  • each substituent on an alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, aryl or heteroaryl may occur multiple times, each occurrence being independently chosen.
  • any of the Formulae herein may be similarly designated R and S.
  • the compounds contemplated herein include all optical isomers, regioisomers, enantiomers and/or diastereomers thereof.
  • the compound is the R enantiomer.
  • the compound has the structure of Formula I, provided however that the compound is not lipoic acid. 1. Amides
  • the compound is an optionally substituted heterocyclic amide having the structure of Formula II:
  • the compound of Formula II has the structure of Formula III:
  • R21 is aminoalkyl, preferably aminoethyl. In some embodiments, R21 is N-substituted aminoalkyl, preferably N- substituted aminoethyl, wherein the pendant amino functionality is in turn substituted with R 27 (e.g., (N,N-dialkylamino)-alkyl, preferably dimethylaminoethyl). In some embodiments, R 27 is C 1 -C 6 alkyl, preferably methyl. In some embodiments, R 21 is phosphonoylalkyl, preferably phosphonoylethyl. In some embodiments, R 21 is hydroxyalkyl, preferably hydroxyethyl.
  • R 21 is hydroxyalkyl, preferably hydroxyethyl, and R 2 o is unsubstituted alkyl, preferably C 1 -C 6 alkyl, more preferably methyl. In some embodiments, R 21 is hydroxyethyl, and R 2 o is methyl. In some embodiments, R 21 is alkyl which in turn is multiply substituted with -OH (e.g., 2,3-dihydroxypropyl), and R 2 o is hydrogen.
  • -OH e.g., 2,3-dihydroxypropyl
  • R 21 is R 26 -substituted or unsubstituted heterocycloalkyl.
  • Exemplary heterocycloalkyl functionalities include, but are not limited to, morpholino and piperazinyl.
  • R 21 is R 26 -substituted tetrahydropyranyl, preferably 3,4,5, 6-tetrahdroxytetrahydro-2H-pyran-2-yl).
  • R 26 is multiply substituted with hydroxyl.
  • R21 is R26-substituted morpholino, wherein R 26 is C 1 -C 6 alkyl, preferably methyl.
  • R 21 is R 26 -substituted or unsubstituted heteroaryl, preferably ( lH-imidazol-2-yl)ethyl.
  • R 21 is R 26 -substituted heteroalkyl, wherein the R 26 -substituted heteroalkyl includes a repeating polymeric unit.
  • Exemplary polymeric units in this context include, but are not limited to, polyethylene glycol [(-C ⁇ 2 -C ⁇ 2 -O-) n , wherein n>l], as known in the art.
  • R 21 is as defined above, and R 2 o is C 1 -C 6 alkyl, preferably methyl, ethyl or isopropyl, more preferably methyl.
  • R 21 is R 26 -substituted alkyl or R 26 -substituted heteroalkyl, wherein R 26 is present in one or more occurrences, and in each occurrence is independently unsubstituted alkyl.
  • R 21 is aminoalkyl, preferably aminoethyl, and R 26 is independently present at the pendant nitrogen 0, 1, 2 or even 3 times.
  • R 2 o and R 21 are independently hydrogen.
  • the compound of Formula III includes an amino acid bound in amide linkage between an alpha nitrogen of the amino acid or a side chain nitrogen of the amino acid, and the acid functionality of lipoic acid, having the structure of either of Formula IVA-IVB following.
  • AA refers to an amino acid having a side chain nitrogen in amide linkage with the lipoic acid functionality
  • R 29 is the side chain of an alpha amino acid, preferably a naturally occurring amino acid or homolog thereof.
  • the linkage between the side chain nitrogen of the amino acid "AA” is indicated by the symbol “JW” in Formulae IVA.
  • Exemplary amino acids include, but are not limited to, the naturally occurring amino acids and homologs thereof (e.g., diaminoproprionic acid, diaminobutyric acid, ornithine, lysine, homolysine), as known in the art. Both D/L (R/ S) stereoisomers of the amino acids are contemplated herein.
  • Further exemplary amino acid amides of lipoic acid having the structure of Formulae IVA-IVB include, but are not limited to, the compounds set forth below:
  • a compound is provided as set forth below: Table 3. Active agent amides
  • R19 is unsubstituted alkylene, preferably C 1 -C 6 alkylene, more preferably C 4 alkylene.
  • R ⁇ is C 1 -Cs, preferably C 1 -C 6 , more preferably C 4 alkylene independently substituted with one or more R22, wherein R 22 is as defined herein.
  • the compound of Formula V has the structure of Formula VI following, wherein R 21 is substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted heteroalkyl, substituted or unsubstituted heterocycloalkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl.
  • R 21 is alkyl, preferably C 1 -C 6 alkyl, more preferably C 1 -C 3 alkyl, most preferably C 1 , C 2 , or C3 alkyl, examples of which include, but are not limited to, the compounds set forth below:
  • R 21 is alkyl, preferably C 1 -C 6 alkyl, more preferably C 3 -C 5 alkyl, most preferably C 3 , C 4 or C 5 alkyl, which in turn is multiply substituted with -OH. In some embodiments, R 21 is alkyl substituted with 1, 2, 3, 4 or even 5 hydroxyl functionalities. All diastereomeric, enantiomeric and regioisomeric forms of compounds of Formulae V, VI, VI(R), and VI(S) are contemplated herein.
  • Exemplary compounds according to any of Formulae V, VI, VI(R), and VI(S) include, but are not limited to, the compounds set forth below:
  • R 21 is R 26 -substituted or unsubstituted alkyl or R 26 -substituted or unsubstituted heteroalkyl
  • R21 is R26-substituted alkyl or R26-substituted heteroalkyl, wherein R 26 is independently present in one or more occurrences, and in each occurrence is independently unsubstituted alkyl, preferably methyl.
  • R21 is aminoalkyl, preferably aminoethyl, and R 26 is independently present at the pendant nitrogen 0, 1, 2 or even 3 times.
  • R21 is a choline substituent in ester attachment with the lipoic acid structure set forth below.
  • the structure may include a counterion, wherein the counterion is any pharmaceutically acceptable counterion capable of forming a salt with the choline lipoate:
  • a substituted group substituted w>ith at least one substituent group is substituted with at least one substituent group. More specifically, in some embodiments, each substituted alkyl, substituted heteroalkyl, substituted cycloalkyl, substituted heterocycloalkyl, substituted aryl, substituted heteroaryl, substituted alkylene, substituted heteroalkylene, substituted cycloalkylene, substituted heterocycloalkylene, substituted arylene or substituted heteroarylene within a compound described herein is substituted with at least one substituent group. In other embodiments, at least one or all of these groups are substituted with at least one size-limited substituent group. Alternatively, at least one or all of these groups are substituted with at least one lower substituent group.
  • the compounds described herein can also be provided as a pharmaceutically acceptable salt.
  • pharmaceutically acceptable salt includes salts of the active compounds that are prepared with relatively nontoxic acids or bases, depending on the particular substituents found on the compounds described herein.
  • base addition salts can be obtained by contacting the neutral form of such compounds with a sufficient amount of the desired base, either neat or in a suitable inert solvent.
  • pharmaceutically acceptable base addition salts include sodium, potassium, calcium, ammonium, organic amino, or magnesium salt, or a similar salt.
  • acid addition salts can be obtained by contacting the neutral form of such compounds with a sufficient amount of the desired acid, either neat or in a suitable inert solvent.
  • pharmaceutically acceptable acid addition salts include those derived from inorganic acids like hydrochloric, hydrobromic, nitric, carbonic, monohydrogencarbonic, phosphoric, monohydrogenphosphoric, dihydrogenphosphoric, sulfuric, monohydrogensulfuric, hydriodic, or phosphorous acids and the like, as well as the salts derived from relatively nontoxic organic acids like acetic, propionic, isobutyric, maleic, malonic, benzoic, succinic, suberic, fumaric, lactic, mandelic, phthalic, benzenesulfonic, p- tolylsulfonic, citric, tartaric, oxalic, methanesulfonic, and the like.
  • salts of amino acids such as arginate and the like, and salts of organic acids like glucuronic or galactunoric acids and the like (see, for example, Berge et ah, "Pharmaceutical Salts", Journal of Pharmaceutical Science, 1977, 66, 1-19).
  • Certain specific compounds of the present invention contain both basic and acidic functionalities that allow the compounds to be converted into either base or acid addition salts.
  • the compounds of the present invention may exist as salts, such as with pharmaceutically acceptable acids.
  • the present invention includes such salts.
  • examples of such salts include, but are limited to, hydrochlorides, hydrobromides, sulfates, methanesulfonates, nitrates, maleates, acetates, citrates, fumarates, tartrates (e.g., (+)- tartrates, (-)-tartrates, or mixtures thereof including racemic mixtures), succinates, benzoates, and salts with amino acids such as glutamic acid.
  • These salts may be prepared by methods known to those skilled in the art.
  • the neutral forms of the compounds are preferably regenerated by contacting the salt with a base or acid and isolating the parent compound in the conventional manner.
  • the parent form of the compound differs from the various salt forms in certain physical properties, such as solubility in polar solvents.
  • the counterion ion is the l,3-dihydroxy-2- (hydroxymethyl)propan-2-aminium cation (i.e., a tromethamine salt):
  • agents described herein can be employed in a method including the step of providing an active agent to a cell, either in vitro or in vivo.
  • the active agents described herein can be employed in a method for treating or preventing oxidation damage to cells. Such a method includes the step of administering a pharmaceutical composition comprising an active agent to a cell, either in vitro or in vivo.
  • the agents can be delivered to cells in vitro or in vivo.
  • the cells are in vivo.
  • the cells can be ocular cells, e.g., lens cells.
  • the agent is delivered to a lens, either in vitro or in vivo. Because oxidative damage has been implicated in other disorders including cancer, the agents may prove useful for administration to any type of cell exhibiting or prone to oxidative damage.
  • the compounds described herein can be used in a method for treating ocular disease.
  • ocular diseases include, but are not limited to: presbyopia, cataract, macular degeneration (including age-related macular degeneration), retinopathies (including diabetic retinopathy), glaucoma, and ocular inflammations.
  • the ocular disease to be treated is cataract.
  • the ocular disease to be treated is treat presbyopia.
  • the methods preferably utilize a therapeutically effective amount of the active agent.
  • therapeutically effective amount means an amount that is capable of preventing, reducing, reversing, and/or slowing the rate of oxidative damage.
  • a therapeutically effective amount may be determined by measuring clinical outcomes including, but not limited to, the elasticity, stiffness, viscosity, density, or opacity of a lens.
  • Lens elasticity decreases with age and is a primary diagnostic and causative factor for presbyopia.
  • Lens elasticity can be measured as accommodative amplitude in diopters (D).
  • Fig. 1 depicts the average elasticity in diopters of an untreated human lens as a function of age in years. The lower the value of D, the less elastic the lens.
  • the agents described herein can decrease and/or maintain D at a value that is greater than the D value exhibited by an untreated lens of about the same age. In other words, the agents can keep accommodative amplitude "above the line" depicted in Fig. 1 (the solid line is mean accommodative amplitude).
  • D is increased and/or maintained at a value about 2, 5, 7, 10, 15, 25, 50, 100, 150, or 200 percent above the line.
  • another embodiment provides any increase in accommodative amplitude, maintenance of accommodative amplitude, or reduction in the rate of decline of accommodative amplitude (i.e., reduction in the rate of decrease in diopters) for an individual lens compared to the accommodative amplitude of the same lens before treatment.
  • the methods provide an increase in accommodative amplitude of about 0.25 to about 8 diopters, or at least about 0.1, 0.2, 0.25, 0.5, 1, 1.2, 1.5, 1.8, 2, 2.5, 3, 5, or 8 diopters compared to the same lens before treatment.
  • Lens elasticity can also be measured by the unit of elasticity E.
  • E average elasticity
  • Fig. 2 depicts the average elasticity (E) of an untreated human lens as a function of age in years.
  • the agents described herein can decrease and/or maintain E at a value that is less than the E value exhibited by an untreated lens of about the same age. In other words, the agents can keep lens elasticity "below the line" depicted in Fig. 2.
  • E is decreased and/or maintained at a value about 2, 5, 7, 10, 15, 25, 50, 100, 150, or 200 percent below the line.
  • another embodiment provides any increase in elasticity, maintenance of elasticity, or reduction in the rate of decline of elasticity (i.e., reduction in the rate of increase in E value) for an individual lens compared to the elasticity of the same lens before treatment.
  • Therapeutic efficacy can also be measured in terms of lens opacity.
  • Lens opacity increases with age and is a primary diagnostic and causative factor for cataract.
  • Fig. 3 depicts the average opacity of an untreated human lens as a function of age in years.
  • the agents described herein can decrease and/or maintain opacity at a value that is less than the opacity value exhibited by an untreated lens of about the same age.
  • the agents can keep lens opacity "below the line" depicted in Fig. 3.
  • lens elasticity is decreased and/or maintained at a value about 2, 5, 1 , 10, 15, 25, 50, 100, 150, or 200 percent below the line.
  • another embodiment provides any decrease, maintenance, or reduction in the rate of increase of opacity for an individual lens compared to the opacity of the same lens before treatment.
  • Therapeutic efficacy can also be measured as a reduction in the rate of cell proliferation, particularly lens epithelial cell proliferation. Thus, in some embodiments, therapeutic efficacy can be measured by cytostatic effect.
  • the active agent can be administered as a racemate or as an enantiomer.
  • lipoic acid and its derivatives are preferably administered to include the R form; cystine and its derivatives are preferably administered to include the L form.
  • Synthetic methods to yield a racemate may be less expensive than stereo-specific processes including isolation/purification steps.
  • administering a single enantiomer can lower the therapeutically effective amount, thus decreasing toxicity effects.
  • the agents described herein are preferably reducing agents.
  • the agents can possess a redox potential Eo' (V) of about -0.01 to about -1.0, about -0.1 to about - 0.5, about -0.2 to about -0.4, or about -0.3.
  • the agents described herein preferably exhibit an acceptable toxicity profile, e.g., a median lethal dose (LD 5 o) of at least 10 ⁇ M, at least 20 ⁇ M, at least 40 ⁇ M, or at least 1 mM.
  • LD 5 o median lethal dose
  • Toxicity can be assessed by any method known in the art such as, for example, viability of human umbilical vein endothelial cells (HUVEC, first passage) using the MultiTox-Fluor assay (Promega) or Live/Dead® assay (Invitrogen).
  • HUVEC human umbilical vein endothelial cells
  • MultiTox-Fluor assay Promega
  • Live/Dead® assay Invitrogen
  • agents selected as pharmaceutical agents for the treatment of presbyopia should exhibit both antioxidant efficacy (reducing power) as well as a desirable safety profile (low toxicity).
  • a screening method is provided whereby dithiol compounds or derivatives are tested for reducing power and/or toxicity.
  • a method includes screening dithiol compounds or dithiol derivatives for their ability to increase lens elasticity either in vitro or in vivo.
  • the agents described herein preferably exhibit favorable membrane permeability, specifically corneal permeability.
  • Corneal penetration can be measured by methods known in the art, such as, for example, those disclosed in Kim et al. (2005) "Aqueous penetration and biological activity of moxifloxacin 0.5% ophthalmic solution and gatifloxacin 0.3% solution in cataract surgery patients" Ophthalmology 112(11): 1992-96.
  • the agent enters the lens epithelial cells using a naturally occurring transport mechanism.
  • lipoic acid and cystine enter lens cells via specific plasma membrane symporters and antiporters. By using lipoic acid, cystine, or derivatives thereof, one can utilize a naturally occurring transport mechanism to deliver the agents to the lens cells.
  • Lipoic acid and cystine occur naturally in eye tissue.
  • a therapeutically effective amount of the exogenously administered agent is often at least about 1 or 2 orders of magnitude larger than the natural level of the agent.
  • the lipoic acid or derivative thereof is administered in a dose amount of up to about 1 mM.
  • the dose amount of lipoic acid or a derivative thereof is about 1 ⁇ M up to 1 niM, preferably about 0.25 mM to about 0.75 mM, or about 0.5 mM.
  • the dose amount of lipoic acid or derivative thereof is no more than 0.5 mM, 250 ⁇ M, 100 ⁇ M, 50 ⁇ M, 20 ⁇ M, or lO ⁇ M.
  • cystine or a derivative thereof is administered in a dose amount of about 1 ⁇ M to about 20 ⁇ M.
  • the dose amount of cystine or a derivative thereof is no more than 20 ⁇ M, the limit of cystine solubility in aqueous solution, or no more than 15 ⁇ M, 12 ⁇ M, 10 ⁇ M, 7 ⁇ M, or 5 ⁇ M.
  • the dose amount will depend on the route of administration as well as the age and condition of the patient. Similarly, the frequency of dosing will depend on similar factors as can be determined by one of ordinary skill in the art.
  • Fig. 2 shows that the inelasticity increases by a factor of nearly 20 during the critical period from age 40 to 55 years. From current data, a 10 ⁇ M dose can decrease the inelasticity over 95% within a millimeter volume element (voxel). Extrapolation of these results to a volume element in the human lens suggests that using this treatment dose on a 55 year old person with a 10 kPA lens starting modulus value (see Fig. 2) could be reduced after treatment to a value of about 0.5 kPA (which then corresponds to a value typically seen with a 40 yr old person). Fig. 1 permits a conversion of these modulus values to optical amplitude: accommodative amplitude is normally reduced to almost 0 above 55 years, while a person at 40-45 years still exhibits around 4-5 diopters of accommodation.
  • the methods include preventative methods that can be performed on patients of any age.
  • the methods also include therapeutic methods that can be performed on patients of any age, particularly patients that are at least 20, 25, 30, 35, 40, 45, 50, 52, 55, 57, 60, 70, 75, or 80 years of age.
  • a pharmaceutical composition in another embodiment, includes an agent as described herein and a pharmaceutically acceptable carrier.
  • a "pharmaceutically acceptable carrier,” as used herein refers to pharmaceutical excipients, for example, pharmaceutically, physiologically, acceptable organic or inorganic carrier substances suitable for enteral or parenteral application that do not deleteriously react with the active agent.
  • Suitable pharmaceutically acceptable carriers include water, salt solutions (such as Ringer's solution), alcohols, oils, gelatins, and carbohydrates such as lactose, amylose or starch, fatty acid esters, hydroxymethyl cellulose, and polyvinyl pyrrolidine.
  • Such preparations can be sterilized and, if desired, mixed with auxiliary agents such as lubricants, preservatives, stabilizers, wetting agents, emulsifiers, salts for influencing osmotic pressure, buffers, coloring, and/or aromatic substances and the like that do not deleteriously react with the compounds of the invention.
  • auxiliary agents such as lubricants, preservatives, stabilizers, wetting agents, emulsifiers, salts for influencing osmotic pressure, buffers, coloring, and/or aromatic substances and the like that do not deleteriously react with the compounds of the invention.
  • the pharmaceutical composition may also contain one or more excipients as is well known in the art of pharmaceutical formulary.
  • the pharmaceutical composition is formulated for ocular use. That is, the pharmaceutically acceptable carrier and/or other excipients are selected to be compatible with, and suitable for, ocular use. Such carriers and excipients are well known in the art.
  • the excipients may also be selected and/or formulated to improve the solubility of the compound.
  • the pharmaceutical composition can include one or more of emulsifiers, buffers, salts, preservatives, lubricants, polymers, solvents, and other known excipients for ocular pharmaceutical formulations.
  • the pharmaceutical composition includes an emulsif ⁇ er and a buffered carrier such as Polysorbate 80 in HBSS (Hank's Balanced Salt Solution).
  • a pharmaceutical composition which includes a compound or pharmaceutically acceptable salt thereof in combination (e.g., in formulation) with a pharmaceutically acceptable excipient.
  • the compounds described herein can be formulated to achieve any delivery system known in the art such as immediate or sustained release delivery; systemic, ocular, or localized delivery; topical or injection delivery; prodrug or caged delivery systems, e.g., coumarin cages (as described, for example, in co-pending application USSN 12/267,260), and the like.
  • delivery system known in the art such as immediate or sustained release delivery; systemic, ocular, or localized delivery; topical or injection delivery; prodrug or caged delivery systems, e.g., coumarin cages (as described, for example, in co-pending application USSN 12/267,260), and the like.
  • Liquid form preparations include solutions, suspensions, and emulsions, for example, water or water/propylene glycol solutions.
  • Aqueous solutions suitable for oral use can be prepared by dissolving the active component in water and adding suitable colorants, flavors, stabilizers, and thickening agents as desired.
  • Aqueous suspensions suitable for oral use can be made by dispersing the finely divided active component in water with viscous material, such as natural or synthetic gums, resins, methylcellulose, sodium carboxymethyl cellulose, and other well-known suspending agents.
  • viscous material such as natural or synthetic gums, resins, methylcellulose, sodium carboxymethyl cellulose, and other well-known suspending agents.
  • solid form preparations that are intended to be converted, shortly before use, to liquid form preparations for oral administration. Such liquid forms include solutions, suspensions, and emulsions.
  • These preparations may contain, in addition to the active component, colorants, flavors, stabilizers, buffers, artificial and natural sweeteners, dispersants, thickeners, solubilizing agents, and the like.
  • Some compounds may have limited solubility in water and therefore may require a surfactant or other appropriate co-solvent in the composition.
  • co-solvents include: Polysorbate 20, 60, and 80; Pluronic F-68, F-84, and P-103; cyclodextrin; and polyoxyl 35 castor oil.
  • Such co-solvents are typically employed at a level between about 0.01 % and about 2% by weight.
  • Viscosity greater than that of simple aqueous solutions may be desirable to decrease variability in dispensing the formulations, to decrease physical separation of components of a suspension or emulsion of formulation, and/or otherwise to improve the formulation.
  • Such viscosity building agents include, for example, polyvinyl alcohol, polyvinyl pyrrolidone, methyl cellulose, hydroxy propyl methylcellulose, hydroxy ethyl cellulose, carboxymethyl cellulose, hydroxy propyl cellulose, chondroitin sulfate and salts thereof, hyaluronic acid and salts thereof, and combinations of the foregoing.
  • Such agents are typically employed at a level between about 0.01% and about 2% by weight.
  • compositions of the present invention may additionally include components to provide sustained release and/or comfort.
  • Such components include high molecular weight, anionic mucomimetic polymers, gelling polysaccharides, and finely-divided drug carrier substrates, as known in the art.
  • the compounds can be administered to a lens by any route of administration including, but not limited to, topical, subtenons, subconjunctival, intracameral, intravitreal, or iontophoresis routes.
  • the agent can be delivered topically, e.g., via an eye drop, gel, ointment, or salve.
  • the compound can be delivered via an acute delivery system, e.g., using nanotubes, local injection, micro-injection, syringe or scleral deposition, or ultrasound.
  • compositions provided by the present invention include compositions wherein the active ingredient is contained in a therapeutically effective amount, i.e., in an amount effective to achieve its intended purpose.
  • a therapeutically effective amount i.e., in an amount effective to achieve its intended purpose.
  • the actual amount effective for a particular application will depend, inter alia, on the condition being treated. For example, when administered in methods to treat cancer, such compositions will contain an amount of active ingredient effective to achieve the desired result (e.g. decreasing the number of cancer cells in a subject).
  • the active agent is present in the pharmaceutical composition in an amount of about 0.1% to about 10% by weight, more specifically about 0.25% to about 10%, about 0.5% to about 10%, about 1% to about 8%, about 3% to about 7%, about 2% to about 5%, about 5% to about 7%, or about 5%. In another embodiment, the active agent is present in the pharmaceutical composition in an amount about 1 ⁇ M up to 1 mM, preferably about 0.25 mM to about 0.75 mM, or about 0.5 mM.
  • a relatively low dose is called for.
  • One such circumstance may be a preventative composition where the objective is to prevent rather than reverse oxidative damage.
  • Another circumstance may be a priming or starting dose that would be titrated upward according to the subject's responsiveness and treatment objectives.
  • the active agent is present in an amount of about 0.1% to about 5%, about 0.1% to about 3%, about 0.1% to about 1%, about 1% to about 3%.
  • the active agent is present in an amount of less than about 250 ⁇ M, about 5 ⁇ M to about 250 ⁇ M, or about 10 ⁇ M to about 100 ⁇ M.
  • the dosage and frequency (single or multiple doses) of compound administered can vary depending upon a variety of factors, including route of administration; size, age, sex, health, body weight, body mass index, and diet of the recipient; nature and extent of symptoms of the disease being treated; presence of other diseases or other health-related problems; kind of concurrent treatment; and complications from any disease or treatment regimen.
  • Other therapeutic regimens or agents can be used in conjunction with the methods and compounds of the invention.
  • Therapeutically effective amounts for use in humans may be determined from animal models. For example, a dose for humans can be formulated to achieve a concentration that has been found to be effective in animals. The dosage in humans can be adjusted by monitoring presbyopia in the human subject and adjusting the dosage upwards or downwards, as described above.
  • Dosages may be varied depending upon the requirements of the subject and the compound being employed.
  • the dose administered to a subject should be sufficient to effect a beneficial therapeutic response in the subject over time.
  • the size of the dose also will be determined by the existence, nature, and extent of any adverse side effects.
  • treatment is initiated with smaller dosages, which are less than the optimum dose of the compound. Thereafter, the dosage is increased by small increments until the optimum effect under circumstances is reached.
  • Dosage amounts and intervals can be adjusted individually to provide levels of the administered compound effective for the particular clinical indication being treated. This will provide a therapeutic regimen that is commensurate with the severity of the disease state of the subject.
  • the ratio between toxicity and therapeutic effect for a particular compound is its therapeutic index and can be expressed as the ratio between LD 5O (the amount of compound lethal in 50% of the population) and ED50 (the amount of compound effective in 50% of the population).
  • LD 5O the amount of compound lethal in 50% of the population
  • ED50 the amount of compound effective in 50% of the population.
  • Compounds that exhibit high therapeutic indices are preferred.
  • Therapeutic index data obtained from cell culture assays and/or animal studies can be used in formulating a range of dosages for use in humans.
  • the dosage of such compounds preferably lies within a range of plasma concentrations that include the ED50 with little or no toxicity.
  • the dosage may vary within this range depending upon the dosage form employed and the route of administration utilized. See, e.g.
  • adjunctive agents can include one or more amino acids or choline to enhance the efficacy of the active agent.
  • the combinations can be advantageous, e.g., in reducing metabolic degradation.
  • co-administer means to administer more than one active agent, such that the duration of physiological effect of one active agent overlaps with the physiological effect of a second active agent.
  • co-administration includes administering one active agent within 0.5, 1, 2, 4, 6, 8, 10, 12, 16, 20, or 24 hours of a second active agent.
  • Co-administration includes administering two active agents simultaneously, approximately simultaneously (e.g., within about 1, 5, 10, 15, 20, or 30 minutes of each other), or sequentially in any order.
  • co-administration can be accomplished by co-formulation, i.e., preparing a single pharmaceutical composition including both active agents.
  • the active agents can be formulated separately.
  • the active and/or adjunctive agents may be linked or conjugated to one another.
  • an active agent e.g., lipoic acid or a derivative thereof, and an adjunctive agent such as choline
  • an adjunctive agent such as choline
  • the conjugate compound be applied to the cornea, and penetration is achieved due to the bi-phasic (water and lipid soluble) nature of the conjugate compound. As the conjugate goes through the cornea, naturally present esterases (enzymes) separate lipoic acid from choline.
  • the lipoic acid (now a pro-drug) in the aqueous bathes the lens and enters the lens epithelial cells (due to low molecular weight and size), and there is reduced by any one of several oxido-reductases (enzymes such as thioredoxin and thioltransferase) to form dihydrolipoic acid.
  • Dihydrolipoic acid now has two extra hydrogen atoms to donate to a disulfide complex (e.g., protein disulfide PSSP), separating the two sulfur atoms into sulfhydril molecules (e.g., protein cysteine residues PSH with free SH groups) thus breaking the inter-cytosol protein cross-links.
  • a disulfide complex e.g., protein disulfide PSSP
  • sulfhydril molecules e.g., protein cysteine residues PSH with free SH groups
  • the dihydrolipoic acid becomes lipoic acid and is available for recycling in the cell to become dihydrolipoic acid or converted to a natural degraded by product thiolactone and excreted.
  • a reducing agent such as one of the compounds described herein, is co-administered with a biochemical energy source.
  • a biochemical energy source facilitates reduction by participating as an intermediate of energy metabolic pathways, particularly the glucose metabolic pathway. Exemplary intermediates of this pathway are depicted by, e.g., Zwingmann, C. et al. 2001. 13C Isotopomer Analysis of Glucose and Alanine Metabolism Reveals Cytosolic Pyruvate Compartmentation as Part of Energy Metabolism in Astrocytes. GLIA 34:200-212.
  • biochemical energy sources include, e.g., glucose or a portion thereof (e.g., glucose-6-phosphate (G6P)), pyruvate (e.g., ethyl pyruvate), NADPH, lactate or derivative thereof. G6P may be favored over glucose since a formulation including glucose may further benefit from the addition of preservatives.
  • the biochemical energy source is an intermediate in a cytosolic metabolic pathway.
  • Exemplary cytosolic pathway intermediates include, e.g., glucose, pyruvate, lactate, alanine, glutamate, and 2-oxoglutarate.
  • the biochemical energy source is an intermediate in a mitochondrial metabolic pathway.
  • Exemplary mitochondrial pathway intermediates include, e.g., pyruvate, TCA-cycle intermediates, 2- oxoglutarate, glutamate, and glutamine.
  • the biochemical energy source is pyruvate compound (e.g., ethyl pyruvate).
  • the biochemical energy source is alanine.
  • the agent is co-administered with glucose-6-phosphate (G6P), NADPH, or glucose.
  • the agent is activated by an endogenous chemical energy, e.g., endogenous glucose.
  • endogenous glucose can activate lipoic acid or a derivative thereof to dihydrolipoic acid (DHLA) or a corresponding derivative thereof.
  • Pentafluorophenyl ester of (R)-lipoic acid The pentafluorophenyl ester of (R)- lipoic acid was synthesis as described in Scheme 3 following.
  • LA-Arg The arginine-lipoic acid conjugate was synthesis as described in Scheme 4 following. Scheme 4. Synthetic scheme for LA-Arg.
  • Lipoic acid choline ester was prepared according to the following synthetic route.
  • Choline salts of alternative reducing agents can be similarly prepared by making the appropriate reagents substitutions. Also, one of ordinary skill in the art would recognize that these syntheses are provided as guidance and that reagents, conditions, amounts, temperatures, and the like may be modified without departing from the general synthetic pathway.
  • the eye drop formulation has a pH of 7.0.
  • the pharmaceutical formulation may be diluted to 100 ml filtered water (e.g., Millex syringe filter (0.45 micron 33 mm).
  • the pharmaceutical composition may be packaged for multi-dose administration, e.g., 2-7 mL (e.g., 5 mL) eyedropper bottle with screw lid dropper.

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Abstract

L'invention porte sur des composés dithiols et sur leurs dérivés. Les agents sont utiles pour traiter une maladie oculaire, notamment la presbytie et une cataracte.
PCT/US2010/038632 2009-06-15 2010-06-15 Composés dithiols, dérivés et utilisations de ceux-ci WO2010147957A2 (fr)

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EP21167955.0A EP4082542A1 (fr) 2009-06-15 2010-06-15 Composés dithiols, dérivés et leurs utilisations
DK10790038.3T DK2442647T3 (en) 2009-06-15 2010-06-15 Dithiolforbindelser, derivatives thereof, and the uses of these
EP10790038.3A EP2442647B1 (fr) 2009-06-15 2010-06-15 Composés dithiols, dérivés et utilisations de ceux-ci
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US8795706B2 (en) 2014-08-05
EP2442647B1 (fr) 2016-03-16
US10039743B2 (en) 2018-08-07
US20170231951A1 (en) 2017-08-17
EP3069612A2 (fr) 2016-09-21
EP3542629A2 (fr) 2019-09-25
US9567314B2 (en) 2017-02-14
US20160264545A1 (en) 2016-09-15
US20140357691A1 (en) 2014-12-04
WO2010147957A3 (fr) 2011-03-03
US20150246903A9 (en) 2015-09-03
PL2442647T3 (pl) 2016-09-30
US20100317608A1 (en) 2010-12-16
EP3069612A3 (fr) 2016-10-19
EP4082542A1 (fr) 2022-11-02
US9284305B2 (en) 2016-03-15
EP2442647A4 (fr) 2012-09-19
EP2442647A2 (fr) 2012-04-25
EP3542629A3 (fr) 2020-01-01
DK2442647T3 (en) 2016-05-30

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